22506330 has 64 divisors (see below), whose sum is σ = 67350528. Its totient is φ = 4676160.

The previous prime is 22506313. The next prime is 22506343. The reversal of 22506330 is 3360522.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 22506297 and 22506306.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2562 + ... + 7181.

It is an arithmetic number, because the mean of its divisors is an integer number (1052352).

Almost surely, 2^22506330 is an apocalyptic number.

22506330 is an abundant number, since it is smaller than the sum of its proper divisors (44844198).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22506330 is a wasteful number, since it uses less digits than its factorization.

22506330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9771.

The product of its (nonzero) digits is 1080, while the sum is 21.

The square root of 22506330 is about 4744.0836839162. The cubic root of 22506330 is about 282.3372806623.

Adding to 22506330 its reverse (3360522), we get a palindrome (25866852).

The spelling of 22506330 in words is "twenty-two million, five hundred six thousand, three hundred thirty".